import {constantRoutes} from '@/router'
import {getRouters} from '@/api/menu'
import Layout from '@/layout/index.vue'
// import ParentView from '@/components/ParentView';
import _ from 'lodash'

const permission = {
  state: {
    routes: [],
    addRoutes: [],
    defaultRoutes: [],
    topbarRouters: [],
    sidebarRouters: []
  },
  mutations: {
    SET_ROUTES: (state, routes) => {
      state.addRoutes = routes
      state.routes = constantRoutes.concat(routes)
    },
    SET_DEFAULT_ROUTES: (state, routes) => {
      state.defaultRoutes = constantRoutes.concat(routes)
    },
    SET_TOPBAR_ROUTES: (state, routes) => {
      // 顶部导航菜单默认添加统计报表栏指向首页
      const index = [{
        path: 'index',
        meta: {title: '统计报表', icon: 'el-icon-menu'}
      }]
      if(routes) {
        state.topbarRouters = routes.concat(index);
      }
    },
    SET_SIDEBAR_ROUTERS: (state, routes) => {
      state.sidebarRouters = routes
    },
  },
  actions: {
    // 生成路由
    GenerateRoutes({commit}) {
      let str = JSON.parse(localStorage.getItem('menuList'));
      return new Promise(resolve => {
        // 向后端请求路由数据
        const sdata = JSON.parse(JSON.stringify(str))
        const rdata = JSON.parse(JSON.stringify(str))
        const sidebarRoutes = filterAsyncRouter(sdata)
        const rewriteRoutes = filterAsyncRouter(rdata, false, true)
        if(rewriteRoutes) {
          rewriteRoutes.push({path: '*', redirect: '/404', hidden: true})
        }
        // rewriteRoutes.push({ path: '*', redirect: '/', hidden: true })
        commit('SET_ROUTES', rewriteRoutes)
        commit('SET_SIDEBAR_ROUTERS', constantRoutes.concat(sidebarRoutes))
        commit('SET_DEFAULT_ROUTES', sidebarRoutes)
        commit('SET_TOPBAR_ROUTES', sidebarRoutes)
        commit('SET_PERMISSIONS', JSON.parse(localStorage.getItem('authorList')))
        resolve(rewriteRoutes)
      })
    }
  }
}

// 遍历后台传来的路由字符串，转换为组件对象
function filterAsyncRouter(asyncRouterMap, lastRouter = false, type = false) {
  if (!asyncRouterMap || asyncRouterMap.length == 0) {
    return false;
  }
  return asyncRouterMap.filter(route => {
    if (route.component) {
      // Layout ParentView 组件特殊处理
      if (route.component === 'layout') {
        route.component = Layout
      } 
      // else if (route.component === 'ParentView') {
      //   route.component = ParentView
      // } 
      else {
        if (!route.parentId || route.parentId.length === 0) {
          let childMenu = [], menuData = {}
          menuData.path = _.clone(route.path)
          menuData.component = _.clone(route.component)
          menuData.name = _.clone(route.menuName)
          menuData.alwaysShow = _.clone(route.alwaysShow)
          menuData.hidden = _.clone(route.hidden)
          menuData.menuName = _.clone(route.menuName)
          menuData.icon = _.clone(route.icon)
          // menuData.meta = _.clone({title: route.menuName, icon: route.icon})
          menuData.parentId = _.clone(route.id)
          menuData.children = null
          childMenu.push(menuData)
          route.children = _.clone(childMenu)
          route.redirect = _.clone(route.path)
          route.path = ''
          route.component = Layout
          // console.log('之后的-------------------------', route)
        } else {
          route.component = loadView(route.component)
        }
      }
    }
    if (type && route.children) {
      route.children = filterChildren(route.children)
    }
    if (route.children != null && route.children && route.children.length) {
      route.children = filterAsyncRouter(route.children, route, type)
    } else {
      delete route['children']
      delete route['redirect']
    }
    return true
  })
  // console.log('asyncRouterMap：', asyncRouterMap)
}

function filterChildren(childrenMap, lastRouter = false) {
  var children = []
  childrenMap.forEach((el, index) => {
    if (el.children && el.children.length) {
      if (el.component === 'ParentView') {
        el.children.forEach(c => {
          c.path = el.path + '/' + c.path
          if (c.children && c.children.length) {
            children = children.concat(filterChildren(c.children, c))
            return
          }
          children.push(c)
        })
        return
      }
    }
    if (lastRouter) {
      el.path = lastRouter.path + '/' + el.path
    }
    children = children.concat(el)
  })
  return children
}

export const loadView = (view) => { // 路由懒加载
  return (resolve) => require([`@/views/${view}`], resolve)
}

export default permission
